Been a long time since I've posted over here ...

A mate of mine had a TD4 Freelander and he cooked the oil in the autobox very easily. If you're doing towing I'd be reluctant to change the cooler as it is not as efficient.

The Jatco 5 spd is VERY sensitive to oil so ensure when you get it replaced it is the correct oil. The early batch of Autos had to be replaced due to wrong oil (my old V6 Auto included).